US Bridges

Diablo RD over Green Valley Creek

Fair

Contra Costa County, California · 0.5 MI E/O I-680 · Structure no. 28C0334

Built
1953
72 years old, rebuilt 1995
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
39 ft
2 main spans
Daily traffic
18,463
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Diablo RD over Green Valley Creek is a concrete continuous culvert carrying Diablo RD over Green Valley Creek in Contra Costa County, California. It was built in 1953 and reconstructed in 1995, so it is 72 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 18,463 vehicles a day, roughly 10% of them trucks, projected to reach 27,625 by 2041. The structure is 39 ft (11.9 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesDiablo RD
CrossesGreen Valley Creek
Location0.5 MI E/O I-680
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.82678, -121.98727
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span16 ft (5 m)
Deck width56 ft (17.2 m)
Roadway width46 ft (13.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,463 (2020)
Projected traffic27,625 by 2041
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Diablo RD over Green Valley Creek built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1995.

What condition is Diablo RD over Green Valley Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Diablo RD over Green Valley Creek carry?

About 18,463 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Diablo RD over Green Valley Creek?

The structure is 39 ft (11.9 m) long with a longest span of 16 ft (5 m) and a deck 56 ft wide.

Who owns Diablo RD over Green Valley Creek?

It is owned by the City or Municipal Highway Agency.